Woolworths can do better

Woolworths is causing me endless frustration with their new rewards app. Initially, it worked okay, although more complicated than the old app. I contacted the call centre in late December to tell them that when I try activate my rewards vouchers, all I get is a blank screen! I have sent them a screenshot of this. The response I get is that there are two profiles in my name — this, apparently, has been resolved; TWICE! I have uninstalled and reinstalled the app; TWICE! I still get a blank screen. I now have no access to my vouchers, and some have already expired. The barista tells me I am not the only one having a problem. So, what are you going to do, Woolworths?